Floor furnace



Jan.8,1946. R. MARTIN 2,392,541

FLOOR FURNACE Original Filed Feb. 1,75,, 1941 2 Sheets-Sheet 2 Patented Jan. 8, 1946 392,541" 7' FEOOR FURNACE l iigs seli Mertin, Wi chita, Kans assignor;v to Coleman Lamp and Stove Company, Wichita,,-

Kane, .a corporation of Kansas ()rigirialatfpiilie:aiition l ebruatry l3;194 1 Seii'ztl N6; 378L698. Divided and this applic'afioti "Novm-' ber 1',-194 1; Serial-No.417,491" V Q'Ciiims." (c1. 126 116") This1invention re1ates -t0flra3ft regulator's particuiarly adapteds for floor furnaces-0f the type disclosed: iii copending-a plication Serial No. 378,698; filed February- 13;- 1941; now- Patent Nb. 2,324,862; dated Jn1y 20}1943, the-present application being a, division thereof. I

Floor furnaces are of ten instaile'd m confined out=c5f way' p'laee's and in buildings havingno basements; consequently they are preferably self- I cont'ai-ne'oliri an outerai'eket' or c'asing which is I enc'lo'se'diat the 'sides and-bottom; usually without" exterior: mean's" o'tabes' eit'eiitEthrbflgh the tob thereof; However; draft regiila tors l are usually installed exteriorly df the furiiace casirig nd a1) plication thereof and' aadjustmeiit miis't' be -made bycrawling under the floor? Therefore; principal-objects of the invention ar tb provide aidraft regulator so ci'esi gn'e'd that it maybe readiIy-"adjusted from the floor'; above the" furnace while' observingcondition of the name through a.'-peep-' hol' in th' -toli'o'f the cbr'ribilfs'tibn chamber; to provide at fio'or ffirnaC WitIi a 'combination dreiift I regiulatorandfiue 'c'o' furnace casing ma y': I I I floor openin'g an'dth d aft? rg iile toi' a'sembleii thereafter: an to provide ai di'etft" regulator-1' which respon'd's' -t difireflc p'rs'iir irisid th'e' burner and the-pressure iri' the fn'rirtc'ecafs I inga" he house isbullt relaf a downflow passage the o or'n' b ing urvedf dovqnwerdly and m he'n' inclined up'-' of tilt?heating if sp'ae being-heated 'a L rasemmw mclnde' sfa, cqnilousi' ion cha be r l fiflfor'med by a' metal sheetrolledfto pr ov parallel front and rear Wall's" l'l-'l 8 at the front and rear of the furnajce'andiubstantially eefiii'circuiar end walls |9 and20 at thesidesjoi the'fnrnac'e; The upper end of the combustion chamber" is eiosed by a top ZFahdtheidwer end h y a bottom 2 2 the mp being "provided 5 with" "one" or more openings 1 air inlet opening 27.

lower portion of the combustion chamber walls 1 a sufficient distance to form a burner or air chamber 25 therebelow and which in turn has flanges 33 which are secured to the upper sur-:

face of the combustion chamber bottom 22.

Supported above the first'series of air inlet damper 6'! is carried in a frame 68 inset within the opening 66. The damper or regulator vane is trunnioned on a rod 69 ata point above its horizontal diameter so that it is out of balance and will swing outwardly at the bottom thereof. The regulator vane has a stop Ill for engaging the frame when it is normally urged to closed position by a weight H carried'on an adjusting screw 72. The adjusting screw is rotatable within an internally threaded insert I3 which is provided in the vane at a point above the trunnioning axis thereof. The inner end of the adjusting screw,

or that projecting into the downflow passageway openings is a conical shaped low flame ring 34 forming a relatively narrow flame opening 35 to control combustion of the fuel when the fuel supply is turned relatively low in providing a low 5 heat. The open tops of the fire-pots are pro-. vided with high flame burner rings 36 having flame openings 31 communicating with the in- -terior of the combustion chamber. are providedadjacent the bottoms thereof with i fuel inlets 38 that are connected by tubes 39 with The fire-pots valves 4! positioned in and forming a part of a fuel level control and safety valve unit M w ich is supported on the frame I3 and is connected by a pipe 42 with a stop valve 43 having connection with a fuel supply line 44 extending through 1 the side wall of the furnace so that the stop valve is located within the casing and accessible through the open top thereof.

The control valves are manipulated'by stems 45 extending upwardly in oneof the downfiow passages and which terminate under thegrill in handles 46 whereby the stems may be readily rotated to adjust the flow of fuel to the burner,

pots. 1

The rear wall l8 of the combustion chamber I6 has an opening 47 and fixedwithin the opening is a collar 48 having agroove 49 inone side thereof for interengaging with a rib 50. on a clamping band 5| which extends about the collar and a pipe 52, the collar being provided with an annular, inwardly extending bead 53 adapted to be engaged by the end of the pipe 52 as shown in Fig. 3. The pipe 52 extends through slots 54 in the inner jacket and across the downflow pas sage l4at the rear sideof the furnace. In order jto divert the air moving through the idown fiow passage laterally across the sides} of the pipe, theinnerja cket carries ahood 55 straddling the pipe but. spaced therefrom. a

The rear wall of the casingis provided in nor izontal' registry with the pipe 5| with an elon- V a 55 lator assembly 51 which constitutes the present v inventio'nf The opening preferably has semicircular ends 58 and conforms in shape to the gated opening 56 to accommodate a draft regure'gulator assembly which projects therethrough from'the inner side of the casing. I

The draft regulator assembly includes a substantially pan-shaped, elongated body 59, having a side wall 66 projecting through the opening 56 and having a back wall 6l' carrying a flue collar 62' in' substantially coaxial alignment with the pipe 52 as shown in Fig. l. regulator. ha a marginal flange 63, and fixed The front of the thereto is a plate 64 having an opening 65 in registry with the collar 48 so that the pipe 52 is readily slidable therein to connect the collar 48 with the draft regulator and form an outlet to a vent pipe (not shown) which is connected with the collar 62.' Located in the opposite end of the plate is'an opening 66, the effective area of which is controlled by a damper or vane 61. The

onrthe burner is thereby controlled in thatthe.

burner takes air for combustion from within the casing. j

When the furnace is to be installed,.an opening is made in the floor, of the building of slightly larger dimensions than thefurnace casing and.

the floor joist are connected by suitable headers as'in conventional practice.

of connection with the furnace and the fuel sup. ply line 44 is installed. The furnace casing, with the draft. regulator assembly removed, is passed through the floor opening so that it; issupported by the flanges provided thereon. The draft regulator assembly 51 is then passedthrough the open top of the casing and pushed into the opening 56 sothat the pan-shaped body thereof projects from the outer side of the casing. The,

. vent pipe (not shown) is attached to the collar 62. and suitable fastening devices it are projected through openings in the flange 63 and through registering openings in the rear wall of the casing to retain the draft regulator assembly rigid.

The fuel, supply line 44 is projected through a suitable opening in the sidewall of the casing and connected with the stop valve 43. This;

completes the outer connections to be made with the furnace.

The pipe. 52 carrying the loosened clamping band 51 is pushed back intothe opening 65.,-The heating andfburner unit assembly 4, carrying the. supportingframe l3 and fuel control and safety valve 4!, is passed-through the open topof the. casing and lowered thereinto until the frame rests on its supports withinthe casing. The fuelcong trol and safety valve unit may then be adjusted to level position as disclosed in the above men- 'tioned application and the pipe 42 leading there-: to is connected with thestop valve 43. The pipe, 52 carrying the clampingband 5| is:withdrawn, fromthe opening of the draft regulator sothat. the band slides over the collar 48, after which'the' band is tightened to draw the rib 5ll into; engage-' ment with the groov es to prevent-retractive. 7 The inner jacket 4 carrying the valve stems 45 is moved intoposi-i tion through the open top of the; casing so that I it surrounds the-burner and heating-units The valve stems arethen connected'with .the control valves. Fuel is turned on to the respective firepots and lighted, through ,the door, openings23iv movement of the pipe 52.

in the top of the combustion chamber. r As the The vent pipe coninection is then made from a chimney to the point a magma saturating h installer.

t ppqrtina a r s mer ily. through the m us icn. chamber. and "do nwardl in pa t hrou h he flue cpns i ges t e. tenth st cn ch m er wa ls. are hea ed ai c rculat p..., occurs. th ou h. the flgqrerill, ha t a rIrisin n e pa e. a ound he. combust on chamber. and dischar in tnrmsh the ntra r iion oi. the r ll, is e: laced. bracelet. r. pa sin downwardly thr ugh he ar in crtions at he. rill. and hrough the. .9; i v, pa sagewa und r the, ower ed e li t e men a ket and. t en upward y. in heat. change, re at on. the. heatin suriaces. or thaeemhusti n chamber:-

qn. suppqr n airare et taken iimmth ma asing, the. proper. Pre e difiere t aibe wee i heinsideand out h burner, s ead lu maintainedin. ac;-

iith. adjustment of he. re u ator. vane. or de BEL a Wha I l im and. desire tov secure by Letters Raten s; 1

A floo urnace. nc udin an oven top, casing having side walls and a. closed bottom, an inner jacket having Walls spaced from the side walls ofthe. casing andfrom said bottom to form a downflow circulating passage therebetween', a heater assemblyfpositioned within planes defined between walls of the inner jacket, a draft regulator mounted in a side wall of the open top casing and having a venting means, a flue connection for the heater assembly, said draft regulator including a housing defining a chamber in communication with the venting means and said flue connection to form a continuous passageway therebetween and having an air inlet opening from said downflow passage communicating with said chamber, a draft regulating damper, means supporting said damper for movement in said inlet opening, and adjustable weight means on the damper accessible through said passage from the open top of the casing whereby the action of the damper is manually adjusted to obtain a required pressure differential between the interior and exterior of the heater assembly.

2. A furnace of the character described including, an open top casing having side walls and a closed bottom, an inner jacket having walls spaced from the side walls of the casing and from said bottom to form a downflow circulating air passage therebetween, a heater assembly positioned substantiallywithin the inner jacket and e ul tor. assembly. being. bodily. positioned ex S nce h r ft ent air adm ttedtotha draft having an air inlet and a flue outlet, a draft regulator directly connected with the flue outlet of the heater assembly, said draft regulator including a housing defining a chamber in communication with the flue outlet and adapted to betcnnseted w th;..a. renti g :maI ..tQ .,0LI{1 a sie na- 92s ass ge herebetneenand having an in with thadownflcwr incir- ,i s nas aes taadmit air. from the. passage intethe cham er when connected with'saidvent: ns an dam er in saidairziniet. at the resmnsi-re to. differential-Hot press res actin thereon fromthe. air circulating pa sa es-a emia hamber orsubstantiauymain taming a pi;edgtermine.ddifierential pressure the circulating air within the downjldwipassage andithe nses within the. heater. assembly.

A furnace. of thecharacter. described includin anpnen toncasing having side walls and. a QlQfied bottom, an .innenjac-ket within the casing having Walls spacedtrom walls. of the casing andsaid bpttomto. term. an. air passagetherebetweenj a humerjand. combustion chamber positioned in theiurnace for. heating air. within the inner jacket, a draft regulator. assembly including a honsingtdefininga.chambenconnectingthe burner and combustion, chamber. assembly to. a venting means, teeming. a continuouspas'sage therebet; en,'said casing wall forming. the air passage. having an opening .to. receive saidhousing, said dQWllflQmflHpassagQ .andsaid chamber, a damper insaid inlet insaidhousing wall, adjustingmeans on th damper accessible; throughtheliopen top -ol thefinfiin by wayof said downflowipassage for attesting. theJposition otsaid damper-.responsive' 1 to re 'ssures acting on the. respective sides there-- closed: bottom, an. inner. jacket within the casing hayingwalls'ispaced fromwalls of the casing and niibottom.toIform-a.downflowairpassagetheresemloly, positioned; substantially .withinthe inn-er jacket, adraft regulatohassemblythaving airnow' connection with the downflow air passage and the combustion chamber, said draft regulator assembly having venting means and including a housing defining a chamber with which both the flue and the venting means communicate to form a continuous passage and said air flow connection having communication with said chamber, a damper in said air flow connection for passing air from the downflow passage into the regulator assembly to provide a regulating draft through the combustion chamber, and means connected with the downflow passage for supplying combustion supporting air to the burner from said air passage.

5. A furnace including, an open top casing adapted for insertion through a floor opening and having side walls and a closed bottom, a burner and combustion chamber assembly supported in the casing, an inner jacket in the casing and cooperating with the walls of the casing and said burner and combustion chamber assembly to form downflow and upflow passages for the circulation of air to be heated, one of said casing walls having an opening therein, a combination draft regulator and flue connection supported by the casing and insertable in said opening from within said downflow passage,

to the casing, said draft regulator being arranged to project outwardly from said wall and having an air inlet from the downflow passage, a vent outlet and a connection with said combustion chamber, a vane controlling said air inletresponsive to differential of pressure in the downfiow passage and the gases vented from the combustion chamber, and means for adjusting action of the vane to effect the'desired diiferential of pressure, said adjusting means being accessible through the downflow passage from the open top ofv the casing.

, 6. A furnace of the character described including an. outer casing, a burner and combustion chamber assembly supported in the casing, means supplying the burner with combustion supporting air from said casing, a combination draft regulator and flue connection including a housing substantially completely disposed exteriorly of the outer casing and defining a chamber and having an air inlet to the interior of said casing and having a flue outlet, duct means connecting the burner and combustion chamber assembly with saidflue outlet through said chamber, and a vane pivotally mounted in said air inlet and having one side subject to pressures in the casing and the other side to pressures within said flue connections whereby the vane is movable responsive to the differential in said pressures to vary the effective opening of the air inlet.

7 A furnace of the character described iDCllld', ing, an outer casing, a burner and combustion chamber assembly supported in the casing, means supplying the. burner with combustion'supporting air from'said casing, a combination draft regulator and flue connection including a housing substantially completely disposed exteriorly of the outer casing and defining a chamber and having an air inlet to the interior of said casing and having a flue outlet, duct means connecting the. burner and combustion chamber assembly with said flue outlet through said chamber, a vane pivotally mounted in said air inlet and having one side subject to pressures in the casing and the other side to pressures within said flue connections whereby the vane is movable responsive to the differential in said pressures, and adjustable means on the vane accessible from the top of the chamber with the housing, said housing defining a chamber forming a continuous passageway between said duct means and the flue connection, a vane pivoted in said inlet of the housing to control air admitted to the chamber from said casing, said vane being pivotally positioned to have one side subject to air pressure in the casing and another side subject to pressure within the cham- 'ber, and a weight adjustably positioned on one side of said vane and arranged to be manipulated from the top of the casing to vary the effect which the air pressure has uponthe vane for controlling diiferential between said pressures.

9. A furnace of the character described including, an open top outer casing having an opening in a side wall thereof, a draft regulator assembly substantially completely disposed exteriorly of the casing and including a housing insertable through said opening from the interior of the casing and having an air inlet connection with'the interior of the casing, a flue connection for said'hous'ing,

' a heater unit in the casing including a combusto control air admitted to the chamber from said casing and having one side subject to air pressure in said outer casing and the other side subject to pressure within the chamber for maintaining a predetermined pressure differential between said pressures;

RUSSELL MARTIN. 1 

